Automatic stop for sound-reproducing machines.



O H. KARCH.

AUTOMATIG STOP FOR SOUND REPRODUCING MACHINES.

APPLICATION FILED JULY24| 1912 RENEWED SEPT. 19. 1916.

LQQQACQD Patented Apr. 1(), 191.72.

' production, by

- 8 rests upon present invention,

carried by tone-arrn Specification of Letters Patent.

fspulication filed. .l'u1y as, 1912, sen-.11 Ho. 211,303.

1 all whom it may consent:

Be it known that'l, Usonn H. KARGH, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful improvements in Automatic Stops for Sound-Reproducing Machines, of which the following is a specification.

This invention relates to a device for automatically stopping a phonograph soundreproducingmachine after the completion of the reproduction of a record, and'partlcularly toa stop of the type in which the movement of the reproducer-m'echanism is employed to throw the stop into operation.

The object of the invention is to produce adjusted in a novel a stop which may be according to the length and simple manner, of the record, so as mediately after the completion of a reproduction, and to this end I employ an an rangement in which the necessary adjustment iselfected, as a preliminary to the resimplymoving the reproducer manually to a position in which the stylus registers with the last portion of the i'ecordgroove, the mechanism being, as the dir'ect and immediate consequence of this ope1.'ation,set in a position in which it will thereafter automatically stop the operation of the machine when the stylus again reaches the same point during the reproducing operation.

In the accompanying drawings:-

Figure 1 is a side elevation of gramophone provided with a stop embodying the the table of the machine being shown in vertical section;

Fig; 2 is aplan view of the same machine with parts broken awa for clearness of illus tration; and

Fig. 3 is a plan-view of a modified form of the invention.

The invention is illustrated as applied to a sound-rcproducing machine of the disk type, though it will be understood that it is also applicable to machines of other terms. The drawings show a gramophone having the usual rotary table 5, which is supported by a vertical shaft 6, this shaftbeing actuated by the usual motor, (notshown) inclosed Within the cabinet 7 The rccord-disk the top of the table, and is engaged by the stylus 9. The machine has also a soundbox 10, of'well-known form, a swinging tone-arm 11. The is journaled upon an axis 12 projecting vertically from the horn 13. .\j

'EDCHESLEEEt, TEE H periphery of the table.

ward end, in

to stop the machine imquestion is in the form of a resilient Renewed September 19, L916. Serial li'o. 121,066.

The automatic stop comprises a brakeby which the rotation of the table 5 may-he arre ted. In the form of the invention illustratcd in Figs. 1 and 2 this brake consists of a block 14, of suitable frictional. material, which is adapted to engage the inner surface of a flange 29 depending from the This brake-block is carried by a lug projecting upwardly from a horizontal slide-rod 15. The slide-rod is concealed, for themost part, beneath the table, and'is slidingly mounted, near its fora bearing-lug 16. The rearportion of the slide-rod is bent upwardly at 17 and thence horizontally again, the rearmo'st horizontal portion being guided in a second bearing-lug 18 which is bent upwardly from a plate 19 fixed to the top of the cabinet 7. To prevent the slide-rod from turning in its bearings it is guided also in a cleft bearing-lug 20 projecting from the plate 19. i

T he brake is thrown into operative engage,- ment with the flange 99 l y means of a com-- pression-spring 21 coiled around the slide rod, one end of this spring being seated against a lug 22 bent ppwardly from the plate 19, while the other end engages lar 23 fixed on the slide-rod. The brake may be disengaged from the table, however, when the machine is to be stai ted, by manipulation of its :i'orward extremity 24, which is bent upwardly to form. a lingen hold by which the slide-rod may be drawn forwardly against the opposition oi the spring 21.

During the reproduction of a record the operation by two cobralze is held out of operating controlling-members, of which one is mounted upon, and actuated by, the shank of the tone arm. The member in split ring 25, which is clasped around the tonearm and is'confined against vertical movement thereon by flanges 26 and 300 above and below-the ring. The oontrollingring 25 is provided with a segmental cam-likeprojection 27, and this projection is engaged by the second cooperating controlling member, in the nature ofa cam-follower, which consists of a flattened rear-extrcn'iity 28 of the'slide-rod. At the center of the projection 27 is an abrupt recess or notch adapted to receive the member 28, as shown in Figs. 1 and 2, and when the parts register a colin this manner the slide-rod is free to move rearwardly sufficiently to bring the bralre into action. When the member 28 rests upon the unbroken portion of the projection 27, however, it is held in a forward position in which the brake does not engage the flange 29, the table being then free to rotate.

It will be apparent that the ring 25, owing to its resilient frictional engagement with the tone-arm, may be turned thereon to adjust it to a position in which the notch in the projection 37 will register with the part 28 at the moment when the tone-arm, in the course of its inward swinging movement due to the feeding of the stylus across the record-disk, reaches a position corresponding to the termination of the record.

- The arrangement of the parts of the mech member 23.

anism is such that'this adjustment may be made without manipulating the ring 25 directly, however. Supposing the machine to be in the position in which it has been arrested after the performance of a reproduction, with the controllirig-members in engagement, as shown in Figs. 1 and 2, and the brake in operation to hold the table; the sound-box may be raised from the record and the disk removed and another disk substituted in the usual. manner. To set the stop before throwing the machine into oporation the operator holds the sound-box with the stylus a short distance above the surface of the record, and swings the tonear'm inwardly until the stylus is just above the last portion of the record-groove. During this swinging movement the ring 25, since itis locked against rotation by the member 28, does not turn with the tone-arm, the necessary relative movement of these parts being permitted by their frictional engagement. \Vhen the stylus has been brought to the position just described the operator pulls on the finger-piece 2- thus disengaging the member 28 from the notch in the ring 23 and at the same time moving the brake out of engagement with the table, which thereupon starts to rotate. The operator then savings tho tone-a rm and the soun l-box into position to start the reproduction: During this last movement the ring turns with the tOIHHHDl, since it has been released by the withdrawal of the The operator then releases the finger-piece Lit, and the spring 21 forces the member 28 into engagement with the pro jection 27 on the ring 2:). The machinenow operates in the usual manner until the automatic feoding-moyement of the stylus in the groove causes the stylus to reach the inner extremity of the groove, and at this moment the cmresponding inward swinging of the tome-arm brings the notch again into operative relation with the member 28, and the brake is then thrown into action to stop the machine. I

The cmistructicn above described is par ticularly applicable to a machine in which the brake operates upon an inner surface of the table. \Vhere it is desirable tohave the brake act upon the periphery of the table, however, the construction shown in Fig. 3 may be employed. In this construction a lever 31 is mounted on a pivot 32 fixed to the cabinet of the machine, and this lever carries, at one end, a controlling-member 33 similar. in function to the member 28 above described and, at the other end, a brakeshoeii t adapted to engage .the periphery of the table. A coil spring 35 tends to move the brake-shoe toward the table and to maintain the member 33. id engagement with the projection 27 on the ring 25. The operation of this mechanism is substantially the same as'that of the mechanism above described and will be obvious. .The means for releasing the brake manually comprises a rod 36, which is pivoted to the lever 31. and'extends forwardly through a bearing-lug '37 on the top of the cabinet, this rod having a fingenpiece 38 by which it may be manipu lated. In this case, howe 791, the fingerpiece is moved. rearwardly, instead of forwardly, to throw the brake out of operation.

I am aware that an automatic stop for a gramophone has been previously proposed, in which a brake has been controlled by two cooperating controlling-members, 0f which one connected with the brake, and the other connected with, and actuated by, the tone-arm of the machine, and that in such a construction it has been proposed to render one of these controllingmembers adjustable in the general direction of the relative movement of the controllingmenihers, so that the time of operation of the sto may be varied. In all such pre vious constructions, however, so far as I am informed, it has been necessary to perform such adjustment by direct manipulation of.

a controlling-member, or other part of the stop-mechani sin. Accordingly, I believe that I am the first to produce an arrangement in which the controlling members, when in the position in which the brake released swinging the tone-arm and the reproducing stylus to the position which it is desired that they shall occupy when the operation of the machine arrested-by the brake.

My invention is not limited to the embodiment thereof hereinbefore described and ilhi-strated in the accompanyingdrawings. but may be embodied in various other forms within the nature of the invention as it is defined in the following claims.

I claim 1- 1'. An automatic stop for :gramophones:

having, in combination with a rotary part and an oscillatory part of a machine, a brake for arresting the movement ofsaid rotary part, and a spring for throwing the brake into operation; means for holding the brake normally out of operation and for throwing it into operation at a predetermmined point in the movement of said oscillatory part, said means comprising two controlling-members provided with means by which they are connected, respectively, with the brake and with said oscillatory part and by which they are heldin cooperative relation and caused, as the result of their rela tive movement due to the movement of they oscillatory part, to release the brake at said predetermined point; said controllihgmembers having parts which interlock when the brake is' releasedas aforesaid, whereby the controlling-members are temporarily locked against said relative movement; and said connecting means between one of the controlling-membcrs and the part with which it is connected, being frictional and yieldable, in the general direction of said relative movement of the controlling-members,

to a force greater than that encountered in the operative movement of the mechanism, so that the mechanism may have a preliminary adjusting-movement, to predetermine the point of operation of the brake, by manual movement {of the oscillatory part while the brake is in action and the controllingmeinliers are interlocked aforesaid.

rin antenna stop for grainopliones having, in combination with a rotary part oscillatory part of a machine, a brake for arresting the movement of said rotary id a spring for throwing the brake 'ion; 1 cooperating controllingincluding a cam caving a surface "ally concentric with the axisozt n the oscillatory part, and an recess in said surface, and a camiollower having an extremity which engages and which racy enter said recess reach the proper relative position; i d contro-ihngmzembers being proinoperative position but is due to the engagement oi? the cam-follower relay interlock with the cam when operation when the cam-tot eluding a frictional device yieldable, in the general direction of said relative movement, to the resistance to such relative 'naovement,

Eli with the notch in the cam, whereby one" of the controlling-members may have a "pref ar'y adjustment, to predetermine the time of release of the brake, by manual movement of the oscillatory part while the brake is in operative position. i

3. An automatic stop for gramophones and thelike having, in combination with a rotary part and an oscillatory part of a machine, a cam adapted to be mounted upon, and to oscillate with, said oscillatoryopart, the'cam having a-cam-surfaoe co-axial with the oscillatory part and provided with a recess; a brake-member having a brake-shoe adapted to engage and arrest said rotary part and an extremity adapted toengage said cam-surface,-means for supporting the brake-member upon-the machine, the brakemember being movable, thereon, toward and from the cam-member, a spring tending constantly to force the brake-member toward the cam, whereby the brake is thrown into operation when said extremity of the brake-member enters the recess in the cani; and yielding frictional means normally retaining the cam in adjusted position on the Stl,

oscillatory part, 'the engagement of the bralzamernber with said recess serving to lock the cam H 'ZUDSl' oscillation in eit 1 rsction will 1e oscillatory part,

CFtllfl-IllQlTlbQi' may be adjusted "by manual movement the oscillatory part.

'4. An automatic stop for gramophones v having, in combination w th and the it rotary pal provid riphera -.ange,andan l.?0""p t able about an an: paralle. vii: th. axis l with a oepe rotation tl part; 1 lient collar ada to clasp "he oscillatory p ral rain-l uy enga ing said J. v z/Bfm g stantly force rection to cause tively enga the ing normally prc extremity w'- ing permitted when the not amsnr'face receivesthe extremitj of the bralr member.

Witnesses v l mnvnir l Dense-tr, D. Gnnnnn. 

